title: Electrokinetic patterning of colloidal particles with optical landscapes.
abstract: We demonstrate an opto-electrokinetic technique for non-invasive particle manipulation on the surface of a parallel-plate indium tin oxide (ITO) electrode that is biased with an alternating current (AC) signal and illuminated with near-infrared (1064 nm) optical landscapes. This technique can generate strong microfluidic vortices at higher AC frequencies (>100 kHz) and dynamically and rapidly aggregate and pattern particle groups at low frequencies (<100 kHz).
authors.affiliation: Purdue University, West Lafayette, Indiana 47907, USA.
authors.forename: Stuart J
authors.initials: SJ
authors.lastname: Williams
authors.forename: Aloke
authors.initials: A
authors.lastname: Kumar
authors.forename: Steven T
authors.initials: ST
authors.lastname: Wereley
mesh_terms: D003102:Colloids / Q000032:analysis* / Q000737:chemistry; D004560:Electricity; D004566:Electrodes; D007259:Infrared Rays; D007700:Kinetics; D007834:Lasers; D008027:Light; D044085:Microfluidics; D011137:Polystyrenes / Q000737:chemistry; D017971:Tin Compounds / Q000737:chemistry
chemical_list: D003102:Colloids; D011137:Polystyrenes; D017971:Tin Compounds; C109984:indium tin oxide